Sole fitting machine



April 1939- T. GULBRANDSEN 2,152,735

SOLE FITTING MACHINE Filed Jan. 10, 1938 Patented Apr. 4, 1939 UNITEDSTATES PATENT OFFECE SOLE FITTING MACHINE Application January 10, 1938,Serial No. 184,179

Claims.

This invention relates to sole fitting machines and is hereinillustrated and described as embodied in a channeling machine of thetype disclosed in United States Letters Patent No.

5 2,015,064, granted September 24, 1935, upon the application ofFrederic E. Bertrand. The machine disclosed in that patent is providedwith a pair of channeling knives which are normally held in operatingposition by springs. The work is supported upon a work table and atreadle-operated mechanism is provided for raising the knives out ofoperating position and also for lowering the work table to enable theoperator to insert and replace a sole.

It is an object of the present invention to provide improved means formoving the operating knife of a sole-fitting machine out of its normalor operating position. In accordance with a feature of the invention apositive connection is provided between a treadle and the knife formoving the knife out of operating position upon move- -ment of thetreadle and mechanism is also provided for disengaging the positiveconnection upon further movement of the treadle, thereby enablingresilient means to return the knife to operating position. In theillustrated construction means is also provided for delaying the returnof the knife to operating position during a portion of the furthermovement of the treadle to afford the operator time to remove aworkpiece.

The invention further resides in features of construction andcombinations and arrangements of parts hereinafter described andclaimed, the

' advantages of which will be apparent to those skilled in the art fromthe following description.

The invention will be described with reference to the accompanyingdrawing, in which Fig. 1 is a view in side elevation of a portion of achanneling machine provided with the improved knife-lifting mechanism;

Fig. 2 is a sectional view taken on the line II-II of Fig. 1;

Fig. 3 is a sectional view in front elevation showing a channeling knifeand its supporting means in relation to a work table.

As has already been mentioned, the improvements about to be describedare illustrated as embodied in a machine of the type disclosed in UnitedStates Letters Patent above referred to. For convenience, therefore,those portions of the machine shown herein which are identical withportions disclosed in the patent will be identified herein by the samereference characters as in the patent.

The supporting structure of the machine comprises a frame 16 upon whichis mounted a head 14. Referring to Fig. 3, a channeling knife 42 iscarried by a slide I86 which is guided for vertical movement in aslideway formed in a carrier 62 which, in turn, is supported foroscillatory movement upon a pin I56 journaled in a bearing I60 formed.in the head 74. The slide I86 is urged downwardly toward awork-supporting table 40 by a spring 224 housed within a bore in theupper portion of the slide. The upper end of the spring 224 bearsagainst a plunger 226 which engages a screw 228 threaded through abracket 230 secured upon the carrier 62. The lower end of the; spring224 bears against the lower end of the above-mentioned bore and thusurges the slide downwardly to a stop position determined by theengagement of a lug 232 (Fig. 1) and a shoulder formed on the carrier62. The stop lug 232 is formed at the extremity of a cross-bar 236secured to the slide I86. The knife 42 forms the inner lip of a doublelipped insole. In Fig. 3 is shown also an edge knife 44 for forming theouter lip of such an insole.

The knife 42 is raised from its operating posi tion by an arm 58!!secured upon a rockshaft 584 which is journaled in suitable bearingsformed in the head 14. The rockshaft 584 is operated, through mechanismpresently to be described, by a treadle 490 fulcrumed upon a shaft 492which is journaled in the base of the machine. An arm 664 secured uponthe shaft 492 is pivotally connected to the lower end of a rod 602. Aspring 683 surrounding the rod 602 urges the rod upwardly and tends tohold the treadle 490 in normal raised position. All the parts so fardescribed are identical with corresponding parts disclosed in theabove-mentioned Letters Patent No. 2,015,064 and are identified by thesame reference characters.

The upper end of the rod 602 is pivotally connected to an arm "10 havinga hub I02 by which the arm is fulcrumed upon a stud 104 secured in thehead 14. Integral with the arm 10!] and extending in an oppositedirection from the hub 102 is an arm 106. A third arm I08 integral withthe arms 10! and H36 extends upwardly from the hub 02. The arms 190, I96and 108, together with the hub 102, thus constitute a three-armed leverfulcrumed upon the stud 104. Mounted for heightwise sliding movement ina guideway 10! formed in the arm 108 is a block H0. A plate H 2 securedto the arm 108 by a pair of screws H4 retains the block H0 in itsslideway. A tension spring 1 I 6 secured at its upper end to the arm 108and at its lower end to the block H urges the block upwardly. A narrowgroove 1|! formed in the arm 108 accommodates the spring H6. Secured inthe block H0 is a pin H8 upon which is mounted a roll 120. The block H0is retracted in its guideway 101 against the force of the spring H6 by aflange 122 formed on one arm of a bell crank 724 which is journaled upona stud 126 secured in a bracket 728 extending from the head 14. Theother arm of the bell crank 124 is connected by a link 13!) to the arm1%. In order to provide for adjustment of the bell crank 124 relativelyto the arm 106 the lower end of the link 13!! is pivotally mounted uponan eccentric 132 formed upon a pin 134 which may be secured in anydesired position of rotary adjustment in the arm 1% by a set screw [36.

Movement of the treadle 49B is communicated through the block I I 0 toan arm '38 secured upon the rockshaft 584. Integral with the arm 138 isan extension 140 in which is formed a latching shoulder 142 engageablewith a detent M4. The detent 144 is pivotally mounted upon a pin 146secured in thehead 14. connects the upper portion of the detent to thehub of the arm 138 and urges the detent into v latching position. Anabutment flange 150 formed in the plate H2 engages a screw I52 threadedthrough the detent 144.

In operating the improved mechanism the treadle 490 is depressed,causing the rod 662 to rock the three-armed lever 100, 706 and 108 in acounterclockwise direction, as viewed in Fig. 1. The upper end of theblock H0 will thus rock the arm'138 in a clockwise direction, causingthe arm 580 to raise the knife slide I86. As the block H0 is swung tothe left, as viewed in Fig. 1, it is also depressed by the bell crankI24 until it disengages the arm 138. By that time,

however, the detent 144 has been drawn by the 224 is then free to returnthe knife 42 to operating position. The screw 152 may be adjusted toengage the abutment 150 at any desired point in the travel of thetreadle 490 to provide a great- .er or less dwell of the knife in itsraised position to enable the operator to move the work-piece before theknife descends. An accurate adjustment to insure disengagement of theblock H0 from the arm 138 as soon as the detent I44 comes into positionto engage the shoulder 142 may be' effected by turning the pin I34. 7

The above-described mechanism offers certain advantages in a machinesuch as that disclosed in the above-mentioned Letters Patent No.

2,015,064. In that machine, it will be recalled,

the work is fed along the table 40 by a pair of four-motion feed dogsmounted in a pair of oscillating carriers, respectively. One of thesecarriers, already. referred to by the reference nu meral 62, is shownherein. The feed dogs derive their components of movement in thedirection of feed from the oscillating carriers; they are also raisedand lowered by other means to cause them to grip the Work against thetable during their advancing movements and to release the work duringtheir return movements. Each of the feed dogs carries a slashing knifein the form of a cutting edge arranged to form an A tension spring 148incision in the face of the sole as the dog descends, which incisionswill extend across the lips to be formed and will facilitate raising thelips at the toe end and at other curved portions of the sole. Thechanneling operation may be stopped at any desired point by depressionof the treadle 499 which results in raising the channeling knives anddepressing the work table. The feed dogs are not affected by the raisingof the knives and continue their up and down movements, holding the soledown relatively to the knives and thus enabling the knives tocut ou oremerge from the surface of the sole. In order to insure against anydamage which might result from the feed dogs and the slashing knivesstriking the surface of the work tablewhile the machine is running idly,mechanism is provided for automatically stopping the up and downmovement of the feed dogs. This stopping mechanism is controlled by theknife slide I86 which in turn is controlled by a presser gage ridingupon the upper surface of the sole. If a sole being fed through themachine should be allowed to run out without the operator depressing thetreadle 4%, the lowering of the presser gage resulting from the removalof the sole will at once cause the up and down movements of the feeddogs to cease. When the operator depresses the treadle 490 to cause thechanneling knives to cut out, it is desirable to insure the stopping ofthe up and down movements of the feed dogs before the treadle isreleased; inasmuch as the release of the treadle enables the work tableto move upwardly into its normal position. The machine disclosed in theabove-mentioned Letters Patent is accordingly provided with a mechanismfor releasing the channeling knife slides before the completion of thedownward movement of the treadle which at first caused them to beraised. As soon as the knife slide I86 is thus returned to its lowermostposition by the spring 224, the automatic mechanism above: referred towill stop the up and down movements of the feed dogs. Then when thetreadle 490 is released the work table 48 will be raised to normalposition without the danger above mentioned. The

up and down movements of the feed dogs will be resumed automaticallywhen a sole is introduced.

One advantage offered by the improved mechanism disclosed herein, whenapplied to a machine of the type under consideration, resides in thefact that the knife-lifting instrumentalities are positive and operatewith certainty. Another advantage is that the channeling knives do notdescend immediately upon reaching their uppermost positions (the heightto which they may be raised'and consequently the duration of theirupward movements being strictly limited by practical considerations) butremain raised for an appreciable interval While the operator isdepressing the treadle. This insures against any chance of the knivesdescending and cutting into the work before the table has been loweredout of the way, however slowly the operator may depress the treadle. Inaddition "to these advan-- tages, the improved mechanism disclosedhereinprovides for a quick raising of the channeling knives and calls for aminimum of effort on the part of the operator in depressing the treadle.

Having thus described my invention, what- I claim as new and desire tosecure by Letters Patent of the United States is:

1. In a sole fitting machine, a knife for operating upon a sole, meansfor urging said knife tonection between said treadle and said knife formoving said knife out of said operating position upon movement of saidtreadle, and mechanism operable upon further movement of said treadle todisengage said positive connection and thereby to enable said urgingmeans to return said knife to operating position.

2. In a sole fitting machine, a knife for operating upon a sole,resilient means for normally holding said knife in operating position, atreadle, a positive connection between said treadle and said knife formoving said knife out of operating position upon movement of saidtreadle, said positive connection including a pair of abutting membersthrough which movement may be transmitted, and means for retracting oneof said abutting members from engagement with the other abutting memberlaterally of their path of movement to release said knife and thereby toenable said resilient means to return said knife to operating position.

3. In a sole fitting machine, a knife for operating upon a sole, aspring for normally holding said knife in operating position, a treadle,a connection between said treadle and said knife for moving said knifeout of said operating position upon movement of said treadle, saidconnection being constructed and arranged to release said knife uponfurther movement of the treadle, and means for delaying the return ofsaid knife to operating position under the influence of said springduring a portion of said further movement of the treadle to afford theoperator time to remove a work-piece.

4. In a sole fitting machine, a knife for operating upon a sole, aspring for normally holding said knife in operating position, mechanismfor moving said knife out of operating position against the force ofsaid spring, a treadle, means connected to said treadle for operatingsaid mechanism to move the knife out of operating position upon movementof the treadle, means for holding said knife in the inoperative positionto which said knife has been moved by said treadle-operated means,thereby afiording the operator time to remove a work-piece, and meansassociated with said treadle-operated means, for releasing said holdingmeans upon continued movement of the treadle thereby to enable saidspring to return the knife to operating position after the work-piecehas been removed.

5. In a channeling machine, a channeling knife, a spring for normallyholding said knife in operating position, a rockshaft, means operated bysaid shaft for raising said knife out of operating position against theforce of said spring, an arm on said rockshaft for rocking the shaft, atreadle, mechanism operated by movement of said treadle to rock said armto cause the knife to raise, a detent for holding the arm in theposition to which it has been rocked by said mechanism, and means onsaid mechanism for tripping said detent upon further movement of saidtreadle, thereby releasing said arm and enabling said spring to lowerthe knife into operating position.

TRYG'VE GULBRAN'DSEN.

